Systems for restoring leak tightness of sealing systems made of concrete in storage and filling facilities for manure, slurry and silage effluent (MSS facilities) and biogas storage and filling facilities (biogas SF facilities) are used for the repair of damage/leaks in the sealing systems, for example, for re-profiling in joint areas or as a concrete replacement for the repair of isolated damaged spots or for closing/filling cracks. Reaction resin mortars and concretes, plastic-modified cement mortars and concretes as well as injection systems with the associated crack filling compounds/materials made of synthetic resins (e.g. epoxy resins, polyurethane resins, acrylate gel) are used for this. Special requirements apply to the use of such systems in MSS and biogas SF facilities.

Regulatory framework

Systems for restoring leak tightness in MSS and biogas SF facilities fall under the Ordinance on the determination of the suitability of construction products and construction techniques under water law by means of verifications in accordance with the Building Codes of the federal states (WasBauPVO) and under the Ordinance on facilities for handling substances hazardous to water (AwSV).

DIBt grants national technical approvals (abZ) and/or general construction technique permits (aBG) for these products and construction techniques, confirming that both the construction and the water law requirements have been met.

The products and construction techniques are thus deemed to be suitable for biogas SF facilities in accordance with Section 63 of the Water Resources Act (WHG). The construction products and construction techniques may also be used or applied in MSS facilities in accordance with Annex 7 of the AwSV.

Please also note the applicable provisions of the federal states following MVV TB, B 4.1 'Technical requirements for stationary systems and system parts used in storage, filling and handling facilities for substances hazardous to water'.